Solution Processed CHNHPbICl Perovskite Based Self-Powered Ozone Sensing Element Operated at Room Temperature.

Hybrid lead halide spin coated perovskite films have been successfully tested as portable, flexible, operated at room temperature, self-powered, and ultrasensitive ozone sensing elements. The electrical resistance of the hybrid lead mixed halide perovskite (CHNHPbICl) sensing element, was immediately decreased when exposed to an ozone (O) environment and manage to recover its pristine electrical conductivity values within few seconds after the complete removal of ozone gas. The sensing measurements showed different response times at different gas concentrations, good repeatability, ultrahigh sensitivity and fast recovery time.